Playing attachment for key musical instruments.



No. 703,743 Patented JuIy I, |902.

H. M. SALYER. PLAYING ATTACHMENT FOR KEY MUSICAL INSTRUMENTS.

(Application led Jan. 10, 1901. Renewed May 5, 1902.) (No Model.) 3Sheets-Sheet I.

mr; 10mn.: r-msns co, Pueroumn. wAsmAGToN, n C.

Patented July l, |902.

H. M. SALYER. PLAYING ATTACHMENT FOR KEY MUSICAL INSTRUMENTS.

(Application led Jan. 10, 1901. Renewed May 5, 1902.)

3 Sheets-Sheet 2.

(No Model.)

WITNESSES:

TH: Normas PETERS co. Puo'roumo., wAsHmoTnN, D. c.

No. 703,743. Patented IuIy I, |902. H'. M. SALYER.

PLAYING ATTACHMENT FDR KEY MUSICAL INSTRUMENTS.

(Application iIed Jan. 10, 1901. Renewed May 5, 1902.)

i\ Mw sfu Y ".I i Iz B I 1 I* I I I WITNESSES: INVENTR /I/.yw

I wf BY mmc@ im @f /WATTORNEY me wams PETERS cu. PHu'mLl'mo., wAsmNsToN,l). l:4

`VUNITED STATES PATENT OEEICE.

.HARRY M. SALYER, OF NFA/Y YORK, N. Y., `ASSIGNOR TO LUDlVlG d: COMPANY,OF NFV YORK, N. Y., A FIRM.

PLAYING ATTACHlVlEN-TFGR KEY MUSICAL lNSTRUNIENTS.

SPECIFICATION forming part of Letters Patent No. 703,743, dated July 1,1902.

Application illed .Ianuary 10,1901. Renewed May 5.1902. Serial No.105,975. (No model.)

To al?. 'wl/,0712, 71T'. may cori/cern.:

Beit known that I, HARRY INLSALYEE@ citizen of the United States, and aresident ofthe city of New York, borough of the Bronx, in the county ofNew `York and State of New York, have invented certain new and usefulImprovements in Playing Attachments for Key Musical Instruments, ofwhich the following is a specification.

This invention relates to improvements in automatic playing attachmentsfor key musical instruments; and the object of myinvention is to'providea new and improved attachment of this kind which is simple inconstruction, effective in use, and permits of automatically controllingpedals, volum es and intensity of sound, and all such other variationsin the playing of a melody that vare requisite for properly and fullyexpressing the composers musical intentions.

In the accompanyingdrawings,iu whichlike letters of reference indicatelike parts in all the iigures, Figure lis a front elevation of myimproved self-playing attachment, parts being in section, some brokenaway and others omitted. Fig. 2 is an enlarged vertical longitudinalsectional View of the valve for controlling the amount of compressed airadmitted into the key-striker-mechanism air-chambers. Fig. 3 is anenlarged vertical sectional View on the line 3 3 of Fig. l, showing apneumatic key striker mechanism and attachments. Fig. L is a verticaltransverse sectional view on the line 4. L of Fig. l, also showing thecasing for the attachment in section. Fig. 5 is a plan view of thelever-board. Fig. (5 is an enlarged edge elevation of thenotesheet-reversing gear. Fig. 7 is au enlarged vertical sectional Viewof one of the controlling-valves for the attachment on the line 7 7 ofFig. l. Fig; S is a front elevation, partly A motor S, preferablyoperated by compressed air, drives the mechanism for winding aperforated music-sheet or note-sheet t from one roller and uponanother,which sheet rests u pou a bridge provided with ducts which areclosed by said sheet except at. such times when a hole in the sheetregisters with the end `Each striker mechanism has a controllingvalve A5for controlling the admission of compressed air from the air-chamber Bto the striker mechanism. Adjacent to and parallel with eachcompressed-air chamber B a chambcr B' is located, which vseveralchambers B are connected by pipes B20 with a suction device or bellowsA12 of any suitable or desired construction for exhausting the air fromthe chambers B and other chambers. At each striker mechanism a neck orhub B2 extends transversely through the chamber B and is provided withholes B3, communicating with the chamber B. In each hub B2 a valve-steinB'l is guided to movelengthwise, and one end of this vstem rests againstone face of a diaphragm B5, against the opposite face of which the stemA" of the valve A3 rests. The opposite end of the stem BL rests againsta diaphragm B, held by a cap BT in a socket BS on the side of thechamber B', which cap has a neck B, from which a tube O Vextends to aduct D' in the duct-bridge D, over which the perforated note-sheet!passes.

YVhen a key-striking mechanism is at rest, the note-sheet closes theduct D' and the air is exhausted from the corresponding tube C, and thusthe diaphragm BG is held in equilibrium, as there is the same suction onboth faces of it. As soon as the duct D] is opened by the registering ofahole in the note-sheet with the duct atmospheric air passes into thetube O and to the left face of the dia- ICO phragm B6. The suction inthe chamber l acting on this large diaphragm causes a movement to theright, and this takes the valve A off the seat. It is true that thissuction acts Aon the diaphragm B5 in reverse direction;

but as only that small portion of the diaphragm B5 at the center of thesame correspending to the diameter of the bore in which the stem B"moves is affected, and this'portion is exceedingly small in comparisonwith The diaphragm B, it does not prevent the movement taking place asdescribed. Likewise the atmospheric pressure on the righthand side ofthe diaphragm can only be effective at this small central portion, andhence does not interfere with the above-described movements. lVhen thevalve A5 is moved oft its seat, the compressed air from the chamber Benters the striker mechanism and forces down the diaphragm A and thestriker-rod. Normally the diaphragm BG and the diaphragm B5 balance eachother, and the suction cannot move the stem B4 when the duct C isclosed; but when the duct C is open this equilibrium is destroyed andthe stem B4 is moved to the right. As soon as' the corresponding duct Dis closed by the notesheet t the parts return to their originalpositions by reason 'of the confined air being drawn off through theexhaust-vent d into the exhaust-chamber d in the bridge or tracker-boardD. A valve C'r1 is provided in each striker mechanism and is opened bythe air-pressure in the cham berll to a degree commensurate with thepressure in said chamber. For the purpose of accentuating any one noteby delivering a harder blow by the striker more compressed air must bepermitted to pass from the chamber B, and this is accomplished byopening the valve C'l to a greater extent. For that purpose the stem ofthe valve C'L is attached to a diaphragm C5, on which compressed air canact, which is conducted into the cap C( of said diaphragm through a tubeC from a compressed-air chamber C7. These aceentuating mechanisms arecoupled together and operate in a manner which is shown in general inFig. l for the purpose of general illustration only; but as the detailsof construction and operation of the accentuating mechanism do not forma part ot' the invention to be described or claimed in the presentapplication no further description will be given than is necessary tostate what they are. Between. the partition or wall D2 and bridge Dl twoshort shafts E and F are mounted to turn and on their outer ends carrythe cog-wheels E and F in two vertical parallel planes, as shown inFigs. S and t). The wheel lt is about three times the diameter ot thewheel F, so that the rerolling-roller, which is driven by the wheel F,will be rotated about three times as fast as the music-rolling roller,which is driven by the wheel E.

A shaft F2 is driven by bevel-gearing or otherwise from the motor S, andon it a sleeve l 'roar/ae F'I is mounted te slide lengthwise and to turnwith said shaft, which sleeve carries a cogwheel F5, which can engageeither the cogwheel E or an idle wheel F, according to the position ofthe sleeve F4, which idle wheel engages the wheel F. y

The sleeve F'l is provided with an annular groove F7 for receiving theforked end G of a lever G, pivoted at G2 to a standard G3, which leveris provided below its pivot with a ring-shaped enlargement G", havingtwo diametrically opposite internal beveled escapement-teeth G5, andwhich teeth can be acted upon by escapement-pins G, arranged in a circleon one tace ol an escapement-disk H and projecting into the circularenlargement GA1 oi' the lever G.

The disk H is 'fixed on one end of a shaft H, journaled in a suitablesupport. Said shaft carries a ratchet-wheel H2, which 1s engaged by apawl H3 on a lever Il", mounted to rock on 'the shaft ll and resting onthe upper end of the plunger-rod H5 of a pneumatic mechanism H, fromwhich a controlling-tube R5 extends to a duct D in the duct-bridge D, sothat every time a hole in the note-sheet registers with this duct thepneumatic mechanism will be operated and the ratchet-wheel H2 turned thedistance of one tooth.

The lever G is provided at its pivoted end with two opposite arms I andl', which are in contact with the upper ends ot' the stems of twopuppet-valves l2 and 13, respectively, which valves are pressed by theirsprings I'1 upward against seats in the small valve-casings l and l,having ducts lT ls, extending to the outer air, and which d ucts can beclosed by the valves l2 and lg, respectively.

One arm l or l is raised when the other is lowered, and the valve belowthe lowered arm is held open while the other is held closed by itsspring.

Every time the lever Ill is thrown up by the pneumatic mechanism l-l theratchetwheel Il is turned one tooth and the disk Il is turned thedistance of one pin G6. As a pin Go alternately acts en the two oppositeescapement-teeth Gl", the lever G is alternately thrown in one directionor the other every time the pneumatic mechanism Il is operated.

lVhen the lever G, Fig. 8, is thrown kto thc right, the cog-wheel F5 isengaged with the playing cog-wheel E, and when the lever G is thrown tothe lett the cog-wheel. F is cngaged with the cog-wheel F and therewinding` cog-wheel F is operated.

rlhe compressed air,which may be produced by foot-power or by means of amotor oi any suitable kind, is stored in the tank .l and from the sameis conducted by the tube J', part of which is shown Vin Fig. -1, to avalvecasing J3, which is connected by a neck Ji with a similarvalve-casing Jl, this latter easing being connected by a neck J5 on itstop with a compressed-air chamber J.

lVithin the casing .V a central hub K is IOO coarse formed on ahorizontal partition K of this casing, which hub has an annular chamberK2 open at the top only and in communication with the neck J3, leadingto the valvecasing J 2.

A valve K4, adapted to rest on and close the top of the hub K has a stemK5 passing down through the central bore of the hub K and attached atits lower end to a diaphragm K6, clamped in the bottom part of thevalvecasing J4 below the horizontal partition K'. That part of thecasing J1 below the diaphragm has a neck K1, and a small hole KS in thehorizontal partition K' establishes communication between the neck J1and that part of: the casing between said partition and the diaphragmK0.

The valve-stem K5 has a duct K'J extending` upward from its lowerend-that is, from below the diaphragm-to the space between the partitionK' and diaphragm K6, as shown in Fig. 7.

An adjusting-screw K10, extending down into the valve-stem K5 from thetop, serves for adjusting the size of the efficient opening of the ductK9.

A tube L, connected with the valve-casing J1, is in communication withthat part of the casing J4 above the upper end of the hub K. The otherend of this tube L is connected with a valve-casing L', which by meansof its two apertured necks L2 is in communication with the two (or more)air-chambers B, Fig. 2.

The casing L' has a transverse partition L3, from which a hub Ll1projects, which is provided with an annular chamber L, open at the freeend of said hub, and with this annular chamber L5 the tubo L isconnected.

The open end of the chamber L5 can be closed by a valve L, adapted toseat on the end of the hub LL and provided with a valvestem L'1,extending through the hub and beyond the Valve L6.

Diaphragms LS and L", secured in the casing L', are attached to oppositeends of the valve-stem L7.

A helical spring M is confined between that end ot the valve-stem L7carrying the dia phragm L8 and an adjusting-screw M in one end of thecasing L', and by means of which screw M the tension of the spring M canbe adjusted. A hole N in the partition L3 establishes communicationbetween the casing L' and the space between the partition Ls and thediaphragm LS.

Beyond the diaphragm L the casing L' l is a second transverse partitionO,having a central hole O', which can be closed by a valve O2, havingits stem O3 passing through said hole and secured to a diaphragm O1,secured in the casing beyond the partition G9 by a cap O5, having a neckOG. A tube OT extends from the space between the diaphragm O1 andpartition O2 to the bellows or a suctiontube connected therewith. L11 isa vent-hole in the extreme opposite end ot the casing L'.

A duct F, formed in the right-hand end of the valve-stem L7, connectsthe compartments at opposite sides of the diaphragm L9 with each otherand can be adjusted in area by means of the screw P', extendinglongitudinally through the valve-stem and projecting through and beyondthe screw M', Fig. 2. A tube P2 extends from the neck O ot the cap O5 toa duct D in the bridge D.

A tube Q extends from the bottom neck K7 of the valve-casing J1 to thecasing l, Fig. 8, and a tube Q extends from this casing` 1G to a cockQ2, having a handle-lever Q3, and from this cock Q2 a tube Q," extendsto the bottom neck of the valve-casing J2, Fig. l.

A tube R, having a cock R', provided with a handle-lever R2, extendsfrom the valvecasing J2 to the motor S.

A tube R3 extends from the cock R to the compressed-air chamber Hof thepneumatic mechanism H6. A tube R5 extends from the valve mechanism ofthe pneumatic mechanism H6 to a duct D in the bridge D, and another tubeR extends from this valve mechn anism to the cock S', having aspring-pressed handle-lever S2, which normally keeps this cock closed.

A pneumatic mechanism T of suitable construction is connected with thecompressedair chamber JG, and its plunger-rod or pistonrod T' extendsdownward and is provided at its lower end with a pad T2, which bears onthe forte-pedal 'nt of the piano.

The rod T passes through an opening in a fixed bracket T5 and is pressedupward by a helical spring T1, surrounding the rod T' and bearing withits ends on said bracket and on a collar T5 on said rod. The samemechanism is provided for the piano or damping pedal, with thedifference that for this pedal the rod T' is provided with a groove ornotch T6 for receiving the end of a spring-pressed latch T7, which whenthe rod T of the pianopedal has been forced down by its mechanismautomatically locks it in lowered position, as shown in Fig. l.

A pivoted elbow-lever V can act on the latch TT to withdraw the same,thus releasing the piano-pedal-operating rod and permitting its springto throw it upward. The lever V can be operated at the desired time bymeans of a pneumatic mechanism V', which is controlled from thenote-shect by means of'an air-tube V2, extending to the bridge D.

The music-roll e is removably mounted on one end ot the shaft E and asuitable bearing on the partition j, and the rewinding-roll f is mountedin a similar manner on the shaft F and a bearing on the partition f.Fach duct D in the bridge D communicates by means of a line aperturedwitha chamber d', formed in the bridge, and said chamber is connectedby a tube d2 with the vacuum-bellows A12 or a tube connected therewith,so as to keep the air rarelied in the said chamber d. Each aperture dcan be adjusted in size by a IOO IIC

fr Vm:

screw (Z3, oi` which one is provided for each duct. Vhenever a duct isclosed by the music-sheett after having been opened by the registeringot a hole in the sheet with a duct, the air remaining in the duct andthe tube leading from the same to a pneumatic mechanism is thus drawninto the chamber d and from the same by the tube d.

The operation is as follows: l will first describe the operation of someot' the parts and then the operation of the entire mechanism. As thecompressed air can pass through the hole KS in the partition K of thevalve-casing J", Fig. 7, into the space above the diaphragm KG and fromthis space through the duct It into the space below the diaphragm, thepressure on the top and bottom ot' the dia phragm will be equal as longasv the coinpressed air cannot escape from the space below thediaphragm, and thus the diaphragm is held in equilibrium and thecompressed air acting' upward on the valve Kl can lift said valve,permitting compressed air to escape into the space above the valve KV and to pass oft through the tube L. Whenever communication is establishedwith the -outer air by Opening the end of the tube Q, connected with theneck K7 of the valve-casing Jl, this equilibrium is destroyed, as thecompressed air can escape from below the diaphragm liu. The pressure onthe top of the diaphragm is now much greater than the pressure upward onthe valve K4, as 'the diaphragm is much greater in area than the valve.The valve in the casingJ2 operates in the same manner as the valve inthe casing J4. The spring lli in the valve-casing L', Fig. 2, is seti'o'r a certain desired air-pressure in the compressedair chambers B. Ascertain parts of a piece of music must be played more forcibly thanothers, a greater quantity ot compressed air must be admitted into thechambers B when such parts are to be played. lVhen the tube P2,connected with the neck 060i" the casing L', is closed by the note-sheett, the same airpressure acts on both sides of the diaphragm L". Thediaphragm Oi normally holds the valve O2 closed. This air-pressureacting on the diaphragm LS compresses the spring M to such an extent asto allow it to hold the valve LG open only to such degree as iscommensurate with the desired pressure in the chambers i5. `When a holein the note-sheet t registers with the tube P2, air passes into thechamber at the right of the diaphragm O4, Fig. 2, and presses thediaphragm to the left as the air is rareied between the diaphragm O'Land the partition O, thereby opening the hole O' and permitting thecompressed airin the space be` tween the diaphragm Li) and the partitionCy to escape through said hole O and be carried ol't by the suctiontubeOl'. The greater pressure on the left-hand side of the diaphragm L0 nowassists the spring M by counteracting the pressure on the diaphragm Lsand permits the spring M to hold the valve L; open to its greatestcapacity as long as the valve 0 is Iros,

I held open. As soon as the tube Piis closed by the note-sheet the valveOsis closed, and there will be the same pressure on both sides ofthediaphragm L and greater pressure on the right-hand side ol the diaphragmLH, which acts against the spring M, and thus the valve L" is broughtback to its normal position and only the normal quantity of compressedair is admitted into the compressed-air chambers B. Vhen the sleeve F4,`Fig. 8, is in position to roll the music-sheet upon the roller c, theinstrument must play and compressed air must be admitted into thechambers B, and, on the other hand,when the note-sheet is being woundback upon the :roller f-that is, rerolledHthe instrument must not playand no compressed air must be admitted to the chambers B, as this wouldproduce discordant noises. Ji/'hen the sleeve Fl is in position forwinding the note-sheet on the roller e-that is, for playinghthe arm Iholds'the valve l2 open and permits the spring ll of thc valve to holdthe same closed, and vicc versa. V/'hen the note-sheet is being wound onthe roller f that is, rerolled-the arm I holds the valve I open andpermits the spring l to hold the valve lil closed. Every time thedirection oi' winding the notesheet t is changed the positions of thevalves l and I3 must be changed accordingly. The coclc Q2 is normallyopen, as is also the valve i3, and eonsequently the valve in the casingJ2 is held on its seat and no compressed air can pass into the chambersJ2 J1. The valve in the casing J2 being held on its seat consequent uponthe cock Q2 being normally open is because it is similar to the actionupon the valve Kl in the casing J'l consequent upon the valve l beingopen. To start the instrument, the handle-lever Q, Fig. 5, is moved tothe left, whereby the cock Q2 is closed, and thus the valve in thecasing JT3 can be raised by the compressed air and compressed airadmitted into the casing J2, which compressed air passes through thecasing Jl iuto the tube L and from the same to chambers i3. The valve isremains closed7 as the sleeve Fl has not been shifted, and consequentlythe air passing from the casing J2 into the casino' J'I can lift thevalve K in the casingJl. At the saine time the motor S is operated bythe compressed air passing to the same through the tube l, and the 1nusiesheet or note-sheet/y is unwou n d from the roller tfupon the rollerc. [it the end of the tune a hole in the notesheet t registers with theduct LV, connected with the tube R, and the pneumatic mechanism HG isoperated and throws up the. lever llt, whereby the arms I and l are soshifted as to open the valve l and close the valve l'l and to reversethe winding-gear. 'lhe closing of the valve l2 has no effect, as thecock Q? is already closed; but by the opening ot' the valve l the valveK* in the l casing Jl is closed, and thus the supply ol' i compressedair to the chambers i3 is shut ol'l, 1 but not the supply to the motor,which con TOO IIO

tinues to run until the sheet t is rerolled upon the roller f. Beforethe end of the sheet is reached a hole in the same again registers withthe duct D', connected with the tube R, the pneumatic mechanism Il is.again operated, the winding-gear is reversed and the valve I3 closed andthe valve 12 opened, and so on alternately until it is desired to stopplaying by moving the lever Q2 to the right, whereby the cock Q2 isopened. When, then, the end of the tune is reached, the valve l2 isagain opened, the compressed air shut oit from the chambers B, and themusic-sheet t rewound upon the roilerf, and then the pneumatic mechanismHG is again operated in the manner set forth by means of the holeprovided for that purpose in the end of the sheet, and the parts arebrought into the positions shown in Fig. S-that is, the valve l2 isclosed and at the same instant the valve l2 is opened. As the cock Q2has already been opened during rewinding to stop the instrument, andthus communication established between the outer air andthe space belowthe diaphragms in the casing J2, the valve in the casing J2 is closed assoon as the valve I2 is opened, and thus the supply ot compressed airshut oft entirely and the instrument stopped with all parts in positionfor playing, and the instrument will begin to play as soon as the cockQ2 is closed again. When it is desired that the music shall be playedfaster, the cock R is opened to a greater extent, so as to admit morecompressed air to the motor S. lf at any time it is desired to stopbefore a tune is iinished and to reroll the sheet t, the springpressedlever S2 is pressed to the right, Fig. 5. Thereby air is admitted intothe pneumatic mechanism H and the sleeve F" is shifted and the positionsof the valves I2 l3 changed instantlyin the same manner as they wouldhave been changed automatically at the end of the tune, and consequentlythe sheet is rerolled and all the mechanism stopped, as set forth above.

Having described my invention, what l claim as new, and desire to secureby Letters Patent, is

l. In a self-playing attachment for musical instruments, the combinationwith pneumatic playing mechanisms, a duct-bridge and means for moving amusic-sheet over the same, of a pneumatic mechanism for reversing themusic-sheet-moving gear and at the same time controlling the admissionof air to the pneumatic playing mechanisms, substantially as hereinshown and described.

2. In a self-playing attachment for musical instruments, the combinationwith pneumatic playing mechanisms,a duct-bridge and means for moving amusic-sheet over the same, of a pneumatic mechanism for reversing themusic-sheet-moving gear and at the same time controlling the admissionof air to the pneumatie playing mechanisms, and a motor for operatingthe music-sheet-moving gear, substantially as herein shown anddescribed.

3. In a self-playing.attachment for musical instruments, the combinationwith pneumatic playing mechanisms,a duct-bridge and means i'or moving amusic-sheet over the bridge, of two valve-casings, a valve in each forcontrolling the admission of compressed air to the pneumatic mechanisms,a tube connected with each casing, a controlling-valve connected witheach tube, means for operating said valves so as to keep one open whilethe other is closed and a pneumatic mechanism foi-operating said means,substantially as herein shown and described.

i. In a self-playing attachment for musical instruments, the combinationwith pneumatic playing mechanisms,a d uct-bridge and means for moving amusic-sheet over the bridge, of two valve-casings, a valve in each forcontrolling the admission of compressed air to the pneumatic mechanisms,a tube connected with cach casing, a controlling-valve connected witheach tube, means for operating said valves so as to keep one open whilethe other is closed and a pneumatic mechanism for operating said meansand a hand-cock in the tube connected with one of said casings,substantially as herein shown and described.

5. in a self-playingattachment for musical instruments, the combinationwith pneumatic playing mechanisms,a duct-bridge and means i'or moving amusic-sheet over the same, of a valve-casing connected with acompressedair-supply tube, a valve in said casing, pneumatic means forcontrolling said valve and a pneumatic mechanism for actuating saidpneumatic \\'alve-oontrolliug means and the music-she'et-moving means,substantially as herein set forth.

o'. In a self-playing attachment for musical instrtimen ts, thecombination with pneumatic playing mechanisms,a d uct-bridge and meansfor movinga music-sheet over the same, of a valve-casing connected witha compressedair-supply tube, a valve in said casing, asecondvalve-casing, Conner-ted with the iirstmentioned valve-casing, a valvein said second casing, a pneumatic means in each casing for controllingthe valve therein, a pneumatic mechanism for controlling the sheetmovingmeans and the pneumatic valve-controlling menus at the same time,substantially as herein shown and described.

7. In a self-playing attachment for musical instruments, the combinationwith pneumatic playing mechanisms,a duct-bridge and means i'or movingamusic-sheet over the same, of a valve-casing connected with a compressed-airsupply tube, a valve in said casing, a compressed-air motor,a tube connecting the niotor with said valve-casing, a secondvalvecasing connected with the iirst-mentioned valve-casing,compressed-air chambers connected with said second valve-casing, a valvein said second casing, a pneumatic means for each casing for controllingthe valve therein, and a pneumatic mechanism for controlling thesheet-moving means and the pneumatic IIC Ifo

valve controlling means aforesaid, at the same time, substantially asherein shown and described.

S. In a self-playing attachment for musical instruments, the combinationwith a ductbridge, and means for moving a music-sheet overthe same, ofcompressed-air chambers, a a valve for controlling the admission ofcompressed air into said chambers, a tube connected with the casing otsaid valve, a valve at the end of said tube, a cock in said tube and apneumatic mechanism for controlling the sheet-moving mechanism and thevalve at the end of the above-mentioned tube, substantially as hereinshown and described.

9. In a self-playing attachment for musical instruments, the combinationwith a ductbridge and a means for moving a music-sheet over said bridge,of a pneumatic mechanism forcontrolling said sheet-moving means,compressed-air chambers, a valve controlling the admission of compressedair into said chambers, means for controlling the said admission-valveby hand, and additional means for controlling the said ad mission-valveautom atically, which automatic means are operated by the pneumaticmechanism controlling the sheet-moving means, substantially as hereinshown and described.

10. Ina self-playing attachment i'or musical instruments, thecombination with two musicsheet-roller shafts, of gearing for rotatingthem, a means for throwing either shaft in gear, a pneumatic mechanismfor operating the gear-shifting means and means for controlling thesupply of motive power to the key-actuating mechanism, by the samepneumatic mechanism that operates the gear-shifting means, substantiallyas herein shown and described.

l1. Inaself-playingattachmentfor musical instruments, the combinationwith two musicsheet-roller shafts, oi' gearing for rotating` them, asleeve for throwing either shaft in gear with the driving mechanism, alever for operating the sleeve, a pneumatic mechanism for operating thelever step by step and a valve for controlling the music producingmechanism, which valve is also controlled b v said lever, substantiallyas herein shown and described.

l2. Inasell-playingattachmentfor musical instruments, the combinationwith a ductbridge,of means for moving a music-sheet over coarse gear, alever for shifting the sleeve, two arms on said lever, a pneumaticmechanism for operating the lever, two valves for controlling theadmission oi' compressed air to various pneumatic mechanisms, a valvefor controlling each admission-valve, said controllingvalve having stemsin the paths of the arms of the aforesaidlever, substantially as hereinshown and described.

13. in a self-playing attachment for musical instruments, thecombination with a ductbridge and means for moving a music-sheet overthe same, of compressed-air mechanisms for operating the sound-producingdevices and rareed-air mechanisms for controlling said compressed-airmechanisms from the music-sheet, substantially as herein shown anddescribed.

14. In a self-playing attachment for 1n usical instruments, thecombination with a ductbridge and means for moving a music-sheet overthe same, of compressed-air mechanisms for operating the 1nusic-producing and other devices, a rareiied-air mechanism, connectedwith each compressed-air mechanism and ducts extending` from saidrareIied-air mechanisms to the duct-bridge, substantially as hereinshown and described.

l5. In a self-playing attachment for musical instruments the combinationwith a ductbridge having ducts and a chamber connected with all theducts, of means for adjusting the connection between each duct and saidchamber and means it'or rareiying the air in said chamber substantiallyas herein shown and described.

1G. In aself-playing attachment for musical instruments the combinationwith a ductbridge having ducts, a chamber formed in said bridge and anaperture extending from each duct to said chamber, of a screw at eachduct for adjusting the size ot the aperture extending from the duct tosaid chamber and means for rarefying the air in said chamber,substantially as herein shown and described.

Signed at New York city, in the county oi' New Yori; and State of NewYork, this 18th day of December, A. D. 1900.

HARRY M. SATYER.

XVitiiesses:

Oscnn n. GUNZ, Il. M. FLANNnnx:

i the bridge,a sleeve for throwing said means in ICO

